noun ad·a·man·tane \ˌa-də-ˈman-ˌtān\

Definition of adamantane



  1. :  a crystalline high-melting hydrocarbon C10H16 having the carbon atoms of its skeleton in the same tricyclic pattern found in the space lattice of the diamond; symmetrical tricyclo-decane

Love words? You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Join MWU now and get access to America’s largest dictionary, with:

  • 300,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

Origin and Etymology of adamantane

International Scientific Vocabulary 2adamant + -ane; probably originally formed as German adamantan

First Known Use: 1933

Seen and Heard

What made you want to look up adamantane? Please tell us where you read or heard it (including the quote, if possible).


capable of being understood in two ways

Get Word of the Day daily email!